Investigation and analysis on seed yields and ripen characteristics of Chamaecrista spp.

Number and temporal distribution of seed of Chamaecrista spp and their seed yields were investigated in Fujian central subtropical area in 2006-2007.Results showed that seed yields of 34 accessions of Chamaecrista spp. were 7.05120.56 g/m2, and the weight of 1 000 seeds was 2.635.89 g, and annual seed number was 1 52721 553 seeds/m2, and seeds could be harvested from August to January. With the increase of latitude of seeds source region, seed yields reduced obviously. Based on data of seed yields, 34 accessions of Chamaecrista spp. could be classified into 3 clusters by Kmeans cluster analyze method: 2 accessions were found belonging to high seed yield type, 5 accessions belonging to middle seed yield type, and 27 accessions (including Wynn、CPI86134、ATF2217 )belonging to low seed yield type. Based on data of temporal distribution of seeds, 34 accessions cloud be classified into 4 maturity types: 11 accessions were early mature type, 5 accessions were middle mature type, 16 accessions were middlelater mature transitional type, and 2 accessions were later mature type. Its recommended that accessions of Chamaecrista spp. could be classified into 3 types (high seed yield type, middle seed yield type and low seed yield type), and 3 types could be identified with brief classification standard of annual seed yield over 80 g/m2, 4580 g/m2, and below 45 g/m2, respectively, in Fujian central subtropical area.